Crossword Genius

Storey renovated for one spending life in bed (6)

Ross

I believe the answer is:

oyster

I'm a little stuck... Click here to teach me more about this clue!

'one spending life in bed' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'storey renovated' is the wordplay.
'renovated' indicates an anagram.
'storey' with letters rearranged gives 'OYSTER'.

'for' acts as a link.

Can you help me to learn more?

(Other definitions for oyster that I've seen before include "Pearl-making mollusc" , "Greyish pink" , "bit of chicken meat" , "Pearl-yielding shellfish" , "Food shellfish" .)

I've seen this clue in The Globe and Mail.
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